Designof Flat-Panel Lamp Generated by Coplanar Dielectric Barrier Discharge Plasma

A novel type of flat-panel lamp,energized by coplanar dielectric barrier discharge(DBD)plasma source with a dielectric anodic-alumina plate,was developed.The influence of the fabrication conditions,including the baking temperature,pulse frequency,gas-pressure,on the ignition voltage and luminous efficiency were studied for the design optimization.The results show that the high temperature baking and high frequency pulse had a major impact.Specifically,as the baking temperature and pulse frequency increased,the stability improved,and the ignition voltage decreased.The prototyped flat panel lamp,with an electrode width of 0.5 mm,a spacing of 4.5 mm,a dielectric layer thickness of 20 μm and operating at 20 Torr,was experimentally evaluated.The self-developed flat-panel coplanar DBD plasma lamp was found to work fairly stable with a luminance of about 7200 cd/m² and a white-light flux efficacy of 4.92 lm/W.